变推力液氧/甲烷膨胀循环发动机系统方案研究

摘要

Based on the system of the LOX/LH2 expander cycle engine, adaptive modifications with tiny changes are completed to satisfy the operation requirement of the variable thrust LOX/CH4 expander cycle engine in this paper. Various issues of the engine such as the injector structure, the regenerative cooling structure of the thrust chamber and the adjustment mode of the variable thrust are analyzed according to the special requirements of the LOX/CH4 propellant and the operation conditions of variable thrust. Based on that, the system program of the variable thrust LOX/CH4 expander cycle engine is confirmed and operation status of each component is analyzed.%在某型氢氧膨胀循环发动机的基础上进行适应性改进，使其尽可能不改变原有部件的同时满足变推力液氧/甲烷膨胀循环发动机的要求。根据液氧/甲烷推进剂和变推力工作条件的特殊要求，对发动机所要解决的各项问题进行了梳理，对喷注器的结构方案，推力室的再生冷却结构，变推力的调节方式等问题进行了研究。在此基础上确立了变推力液氧/甲烷膨胀循环发动机的系统方案，分析了各组件的工作状态。